Drag--When your fly is being pulled along by opposing currents
Cutbow--a rainbow/cutthrout hybrid
Flouro--Fluorocarbon tippet material
Birdsnest--When your line gets all tangled
Meat Hole--A spot on the river where the fish are stacked up
Bucktail--Streamer pattern tied with deers tail hair
Dead Drift--Your fly moving along the water at the same speed as other objects.
Chromer--A bright, fresh fish
Mysis--silvery freshwater shrimp